26191397741 has 2 divisors, whose sum is σ = 26191397742. Its totient is φ = 26191397740.

The previous prime is 26191397719. The next prime is 26191397851. The reversal of 26191397741 is 14779319162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16581712900 + 9609684841 = 128770^2 + 98029^2 .

It is a cyclic number.

It is not a de Polignac number, because 26191397741 - 2¹⁴ = 26191381357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26191397741.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26191397041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13095698870 + 13095698871.

It is an arithmetic number, because the mean of its divisors is an integer number (13095698871).

Almost surely, 2^26191397741 is an apocalyptic number.

It is an amenable number.

26191397741 is a deficient number, since it is larger than the sum of its proper divisors (1).

26191397741 is an equidigital number, since it uses as much as digits as its factorization.

26191397741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 50.

The spelling of 26191397741 in words is "twenty-six billion, one hundred ninety-one million, three hundred ninety-seven thousand, seven hundred forty-one".